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<head>
    <meta charset="UTF-8">
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    <title>Document</title>
    <link rel="stylesheet" href="css1.css">
    <style>
        .my1{
            color: red;
        }
        #my2{
            color: yellow;
        }
    </style>
</head>
<body>
    <span style="color: blue;">G</span>
    <span class="my1">o</span>
    <span id="my2">o</span>
    <span >g</span>
    <span >l</span>
    <span >e</span>
</body>
</html>